My dog was doing the same thing and we got the bitter apple stuff and rubbed all the cords we couldn't get up, the moldings and furniture legs. So far so good.
I also have a squirt bottle with a focused spray that can squirt about 8 feet. When she goes for something she isn't supposed to that we couldn't use the bitter apple on ( Like upholstery).."God" mysteriously sends a wet spurt into her backside. ( She HATES it) But since I squirt then look away nonchalantly ( I do everything but whistle! LOL) when she jerks around to see if " I" am the cause of the water...she hasn't made the connection it only happens when I am there. SO far she believes that chewing "No no's" get her wet and even when we aren't right there she has stopped. But it IS pretty funny to see her sniff a no no..then look around to see if water is forthcoming! LOL